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sprotz

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  1. I have a 300 PSI 12V DC electric air compressor similar to this one: https://images.app.goo.gl/MbjmzB3DxBmbnGdG9 I plug it in to a 12V DC, 3.5 Amps current and it inflates and stops at around 130 PSI. For a long time the needle doesn't go beyond that but I want it to reach 300 PSI. What could be the problem? What should I do? Udate: I dismantled the thing and saw its simplistic construction. I saw that the piston and cylinder are short, and that the piston does not fully touch the end of the cylinder when pushed in. Also there is some significant amount of space between the piston, cylinder and the valve that prevents backflow. I'm thinking maybe the piston compresses air only to a certain point before receding and therefore not being able to pump in more pressure because of the space ? Because the compressor keeps pumping at full speed but the pressure gauge only ever reaches 140 PSI.
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